The most common and most likely answer to this crossword clue is the 3 plus 3 plus 3 letter word OUT AND OUT
I've seen this crossword clue in The Times
O
U
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A
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More clues leading to the result OUT AND OUT
Buddy explains!

The straight part
We know that "Absolute" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case absolute = out and out.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does OUT AND OUT mean?
OUT AND OUT adjective- Complete, utter.
- (animal husbandry) thoroughly cross-bred; a breeding strategy esp. with poultry where new roosters are circulated yearly to maintain a mongrel flock.